Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 10/01/2010, Docket: RP10-1140-000, Status: Effective

Forty-Fifth Revised Sheet No. 19 Forty-Fifth Revised Sheet No. 19

Superseding: Forty-Fourth Revised Sheet No. 19

NOTICE OF CURRENTLY EFFECTIVE RATES

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(ALL RATES ARE STATED IN CENTS PER DEKATHERM OR EQUIVALENT DEKATHERM AS INDICATED)

TOP GAS SUPPLY BASE TARIFF

BASE TARIFF ACA THROUGHPUT REALIGNMENT RATE PLUS

RATE SCHEDULE UNIT RATE SURCHARGE SURCHARGE SURCHARGE SURCHARGES

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RATE SCHEDULE FS-1

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CAPACITY RESERVATION

MAXIMUM RATE PER EQV. DKT PER MO. 2.102 N.A. N.A. N.A. 2.102

MINIMUM RATE PER EQV. DKT PER MO. 0.000 N.A. N.A. N.A. 0.000

CAPACITY DELIVERABILITY

MAXIMUM RATE PER EQV. DKT PER MO. 190.602 N.A. N.A. N.A. 190.602

MINIMUM RATE PER EQV. DKT PER MO. 0.000 N.A. N.A. N.A. 0.000

INJECTION

MAXIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

MINIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

WITHDRAWAL

MAXIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

MINIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

SCHEDULED OVERRUN CHARGE

INJECTION

MAXIMUM A/B/ RATE PER DKT 23.920 N.A. N.A. N.A. 23.920

MINIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

WITHDRAWAL

MAXIMUM A/B/ RATE PER DKT 23.920 N.A. N.A. N.A. 23.920

MINIMUM A/B/ RATE PER DKT 0.888 N.A. N.A. N.A. 0.888

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A/ SHIPPER MUST REIMBURSE TRANSPORTER IN-KIND FOR STORAGE FUEL USE, LOST AND UNACCOUNTED FOR GAS. THE APPLICABLE PERCENTAGE IS 0.402%, CONSISTING OF 0.568% FOR THE

CURRENT PERCENTAGE AND (0.166%) FOR THE DEFERRAL PERCENTAGE. THIS PERCENTAGE SHALL BE APPLIED TO THE APPLICABLE QUANTITIES OF GAS INJECTED AND/OR WITHDRAWN BY

TRANSPORTER FOR SHIPPER'S ACCOUNT AT TRANSPORTER'S STORAGE FACILITIES.

B/ SHIPPER MUST REIMBURSE TRANSPORTER FOR ELECTRIC POWER USED FOR STORAGE. THE APPLICABLE RATE IS 0.182 CENTS, CONSISTING OF 0.346 CENTS FOR THE CURRENT RATE AND

(0.164) CENTS FOR THE DEFERRAL RATE. THIS RATE SHALL BE APPLIED TO THE APPLICABLE QUANTITIES OF GAS INJECTED AND/OR WITHDRAWN BY TRANSPORTER FOR SHIPPER'S ACCOUNT

AT TRANSPORTER'S STORAGE FACILITIES.